6 electrical connections – Flowserve ME User Manual

Page 20

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ME USER INSTRUCTIONS ENGLISH 71576287 - 02/13

Page 20 of 36

flowserve.com

4.5.2.2 Design of a suction lift line
The inlet pipe must be as short and as direct as
possible, never place an elbow directly on the pump
inlet nozzle.

I : Sufficient
immersion

Valve-strainer

Valve
Non-return
valve

I

3 x D

a) Avoid sharp elbows or sudden narrowing. Use

convergent

20° (total angle) with upright

generating.

b) Arrange that the suction piping is inclined

upwards towards the pump ensuring that there
are no peaks.

c) If a foot valve is necessary, do not oversize it

because it would generate pulsations (valve
beating).

Do not tighten flanges before the final

check (see § 4.5.4).

4.5.3 Discharge piping

4.5.3.1 Design of a discharge line
a) If discharge line is provided with a divergent, its

total angle will be between 7° and 12°.

b) Install the discharge valve after the non-return

valve downstream.


The non-return valve will be set in the discharge
pipe to protect the pump from any excessive
pressure surge and from reverse rotation.

If necessary, a control manometer (pressure gauge)
can be connected on the piping.

C o n tr o l
m a n o m e te r

Installation of the control manometer

Do not tighten flanges before the final

check (see § 4.5.4).

4.5.4 Final checks
a) Check the tightening of anchor bolts. Tighten

them if necessary.

b) Check that protective covers on suction and

discharge flanges are removed.

c) Check that holes of piping flanges are parallel

and correspond to those of the pump.

d) Tighten suction and discharge flanges.

4.6 Electrical connections

Electrical connections must be made

by a qualified Electrician in accordance with relevant
local national and international regulations. This
includes any grounding.

It is important to be aware of the EUROPEAN

DIRECTIVE on potentially explosive areas where
compliance with IEC60079-14 is an additional
requirement for making electrical connections.

Avoid mechanical, hydraulic or electrical overload

by using motor overload trips or a power monitor and
make routine vibration monitoring.

It is important to be aware of the EUROPEAN

DIRECTIVE on electromagnetic compatibility when
wiring up and installing equipment on site. Attention
must be paid to ensure that the techniques used during
wiring/installation do not increase electromagnetic
emissions or decrease the electromagnetic immunity of
the equipment, wiring or any connected devices. If in
doubt, contact Flowserve for advice.

The motor must be wired up in

accordance with the motor manufacturer's
instructions (normally supplied within the terminal
box) including any temperature, earth leakage,
current and other protective devices as appropriate.

The identification nameplate should be checked to
ensure the power supply is appropriate.
A device to provide emergency stopping shall be
fitted.

Carry out the ground connections according to the
current local regulations.

To avoid any risk of jamming, the

direction of rotation will be checked after priming of
the pump (§ 5.3.1, 5.3.2) and before the first start (§
5.4.2).

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